High Brightness LED Strobe Using IC 555

Engineeering Projects
high brightness led strobe using 555 circuit

Here is one another project which is useful in our daily life using the most popular IC NE555. The project high-brightness LED strobe uses an array of 36 high-brightness LEDs. The advantage of project is it is small battery powered and very efficient. A variable resistor on the side allows the frequencies of the flashing to be varied. Circuit Description of High Brightness LED Strobe Using IC 555 Circuit diagram of high-brightness LED strobe is shown in figure 1. The entire circuit is build around timer IC NE555 (IC1) or we…

Read More

Low Frequency Sine Wave Synthesizer

Engineeering Projects
low frequency synthesizer circuit

The generation of low frequency is generally accomplished with an RC oscillator. The techniques recently developed for frequency synthesis can now be used conveniently with very precise low frequencies required. A low-frequency sine-wave synthesizer well demonstrates accuracy and stability characteristics that can be measured in part per million (even at 0.01 Hz) if it is crystal controlled. Circuit Description of Low Frequency Sine Wave Synthesizer The synthesizer in figure 1 is based on an 8-bit digital-to-analog converter IC AD7523 (IC5) which presents a precise triangle wave to the timing of a…

Read More

Fiber optic telemetry system Using NE555

Engineeering Projects
circuit diagram of fiber optic telemetry system

Complete fiber optic systems are finding widespread use in all types of applications figure 1 provide a very simple fiber optic telemetry system using NE555 that can be used in a variety of telemetry application essentially. The transmitter is an astable oscillator using the popular NE555 (IC1). Circuit Diagram of Fiber optic telemetry system Using NE555 The variable resistance LDR1 contract the rate of the pulse applied to the LED. LDR1 can be any variable resistance transducer such as a strain gauge for pressure sensing, a thermistor for temperature sensing, or…

Read More

Telephone Converter Circuit

Engineeering Projects
circuit diagram of telephone converter circuit

A telephone converter circuit that can be used to power the circuit added to the basic phone is shown in figure 1. This may be more economical/convening than adding a separate power supply from the AC power line or using battery power. It takes the -48V provided by the telephone and efficiently converts it to a well-regulated 5V. Circuit Description of Telephone Converter Circuit A telephone converter circuit does not require the bulk and expensive transformer which is usually used in these designs. It takes the -48V (it can function…

Read More

Universal Crystal Test Circuit Using CA4007

Engineeering Projects
circuit diagram of cristal test circuit

Crystal oscillators may fail to operate due to faulty design or faulty crystals. The circuit shown in figure 1 works well as a crystal tester for a wide variety of crystals and ceramic resonators over the 40-kHz to the 20-MHz range. Circuit Description of Universal Crystal Test Circuit Using CA4007 The oscillator in figure 1 is a Pierce type that operates at the crystal’s parallel resonant frequency and presents about 30 pF capacitance to the crystal. The IC1 (CA4007 A) contains three pairs of complementary MOSFETs with the first (input at…

Read More

Sort Circuit Protected Regulated Power Supply Using 741

Engineeering Projects
short circuit protected regulated power supply

Various Power Supply-based projects are already available on bestengineeringprojects.com like short-proof variable power supply, stabilized power supply with short circuit indicator, Universal digital power supply, variable switching power supply, etc. Now here is a straightforward circuit of short circuit-protected regulated power supply utilizing very few components. Circuit Description of Short Circuit Protected Power Supply The electronics project short circuit protected variable power supply utilizing an op-amp 741, two NPN transistors, and a few passive components. Unregulated or fluctuating voltage is first regulated and smoothened by diode D1 and Zener diode ZD1.…

Read More

Electronic Room Thermometer Using Op-amp 741

Engineeering Projects
electronic room thermometer using op amp 741

These days electronic room thermometer is very popular, though it is expensive. Now here we designed a simple and cheap electronic room thermometer using a temperature sensor and op-amp 741. Circuit Description of Electronic Room Thermometer using Op-amp 741 The heart of the circuit electronic room thermometer is IC1 (LM3911), which is used here as a temperature sensor. The output of this IC is variable according to temperature change. Its output increases at the rate of 10mV/0C rise in temperature. At 00C its output is 2.73V. The output from IC1…

Read More

Light Operated lamp switch using DIAC and TRIAC

Engineeering Projects
light operated on off switch without ic

Various electronic projects using LDR (Light Operated Resistor) are already posted on bestengineeringprojects.com. Now, here is another simple project using LDR called a light-operated lamp switch using DIAC and TRIAC. This circuit utilizes very few components and is so simple that anyone can understand it. Circuit Description of Light Operated Lamp Switch: The circuit of light operated lamp switch utilizes a diac and a triac as semiconductors and LDR as a sensor. LDR is a type of variable resistor that changes its value according to the intensity of light falling…

Read More

A Phone Book Application Using C

Engineeering Projects

Phone book Application using C is a simple application that incorporated most of the features of C. I had discussed each of the features of this application between the code, although most of the code has comments. The phone book application provides features like storing a room/phone number into a database, sorting and finding the room number/phone number, etc. This phone book application uses the graphic library for interaction with users. This application can store up to five hundred entries but is not limited to it, user can increase and…

Read More

Employee Management System Using C

Engineeering Projects
menu of Employee Management System Using C

The project employee management system using C manages employee records using the file system. this help to register employee, display all list of an employee on the screen, search a  particular employee record, modify and delete information of an employee. The best part of this project is it uses graphics to more look like real software designed in other higher-level programming languages. So before starting to look for code let’s see the output of the project Employee Management System Using C. This project is compiled using Turbo C++. Figure 1:…

Read More
  1. Pages:
  3. 1
  4. ...
  5. 57
  6. 58
  7. 59
  8. 60
  9. 61
  10. 62
  11. 63
  12. ...
  13. 83